Year	constant 2011 international $
1990	3661.34021335374
1991	3327.81289678806
1992	2319.00716062684
1993	1907.21066794585
1994	1478.28458842953
1995	1275.50119156066
1996	1046.77762007988
1997	1048.76812641899
1998	1088.18211285093
1999	1111.42520569557
2000	1185.2194406002
2001	1277.77187002118
2002	1392.37799109972
2003	1517.4667021702
2004	1644.45564116681
2005	1720.93088622516
2006	1806.76541553961
2007	1908.35557495284
2008	2017.25644138433
2009	2051.72671117661
2010	2138.29186268137
2011	2245.78533483222
2012	2359.55252653696
2013	2476.01418146754
2014	2580.24756032414
2015	2670.18020232317
2016	2784.67660979973
2017	2923.67371765289
2018	3061.07072145518